Method for reinforcing aqueous hydraulic cement

ABSTRACT

Aqueous solutions containing phosphoric acid, phosphate, or a salt of titanium, zirconium or hafnium are useful for forming coatings on the glass fiber surfaces. Such coatings may be formed by immersing the glass fiber in the solution at elevated temperatures. The coating enhances the alkali corrosion resisting properties of the glass fiber, so that the glass fibers surface-treated therewith are particularly useful as reinforcement in aqueous hydraulic cement mixtures for imparting to the curved products made therefrom, physical strength which is stable with elapse of time.



